First of all , the basis knowledge of stegnography is introduced . then , the methods of hiding data in digital images and printed - images are proposed . an associated case of information hiding in binary images , which is mainly about digital seal for authentic document , is developed finally 文章首先简单介绍了信息隐藏的基本概念、模型及其基础知识；接着提出数字和纸质二值图像的隐藏算法；文章的最后给出一个二值图像信息隐藏实例：数字印章的文件防伪。
In this paper , the contrast of original image is enhanced by nonlinear transformation based on the characteristics of grain image ; after comparing several methods of threshold segmentation and analyzing their performance and applicability on grain image , the adaptive threshold segmentation based on gradient image is presented ; the noise of binary image is reduced with morphological filter , the hollow in binary image is filled in and a recognition algorithm is designed to remove agglomerate particle ; on the basis of mathematical morphology two methods are adopted to segment agglomerate grains that are not agglomerated tightly ; the parameters of size and shape , perimeter , area , diameter , complexlity , longest feret diameter , shortest feret diameter etc , are extracted . this technique is applied in measurement of pearl powder ' s particle size 本文根据粒度图像的特点，采用非线性对比度增强处理改善颗粒显微图像的对比度；对多种阈值分割方法进行比较，分析了它们的性能和用于粒度图像的适用性，在此基础上提出了一种基于梯度图像的动态阈值分割方法；对获取的颗粒二值图像进行形态滤波和空洞填充，设计了识别算法去除凝聚体；对重叠不太严重的粘结颗粒采用了两种基于数学形态学的分割算法；提取了周长、面积、粒径、复杂度、最长feret径、最短feret径等大小和形状特征参数，对珍珠粉等粉体粒度进行了测量。
The watermark algovithm can resist the physical transfer of printing and scanning by applying techniques such as fixation normalization mutually which can secure the embedding position , chaotic encipher encryption , multipassage embedding and so on . what ’ s more , the watermark designed in this essay is binary image . it can bear a large amount of information 本文综合运用了归一化相关确定嵌入位置、混沌加密、多通道嵌入等技术,使得本文所设计的水印算法能够抵抗印刷和扫描的物理转换过程,同时本文所采用的水印是二值图像,能够承载大量的信息。
After studying the nowadays methods , combining the characters of binary scanned maps images , the author designs a method to recognize and capture the digital geography information , which is based on thinning algorithm . a system is also realized by this method in the visual c + + programming environment 本文在研究、分析现有扫描图像矢量化方法的基础上，与地图扫描二值图像的特点相结合，设计了一种基于图像细化算法的地图信息识别与提取的方法，并以此为理论指导在visualc + +环境下编程实现了一个自动矢量化实验系统。
It takes use of pseudo - random technology , dynamic adaptive technology , multi - channel technology , random position embed technology and so no . so the digital watermarking can resist the physical process of printing and scanning . at the same time , the watermark is binary image which includes a great deal of information , such as personal id , secret information , even a piece of map 本文特别针对印刷和扫描给数字图像带来的误差的问题，设计了一种新的水印算法，综合运用了伪随机处理技术、动态自适应技术、不同应用选择不用频带处理技术、随机位置嵌入技术、多通道嵌入等技术，使得本文所设计的水印算法能够抵抗印刷和扫描的物理转换过程，同时本文所设计的水印是二值图像，能够承载大量的信息，例如个人id 、机密信息、商标标识，甚至可以是一幅地图。
An approach for transparent image watermarking is proposed based on wavelet multiresolution decomposition in which a binary image is embedded in the original image ; in the light of characteristic and tree structure relation of the wavelet coefficients , the embedding strength is determined by the local luminance feature and texture features of the image 摘要提出一种小波域透明图像水印算法，算法将一个二值图像内嵌到原始图像经过小波多分辨率分解后的低频子带上，根据低频系数和高频系数的特点以及树结构关系，并由图像的局部亮度和纹理特性对水印嵌入强度做自适应调节。
Simulations show that this method can quickly and accurately recognize the object in input image and has a few strong robustness against noise in the input image . secondly , the simulations for two kinds of control algorithms based on pd , namely , direct pd control and pd control with feedforward compensation , have been completed in this thesis . simulations show that both control algorithms have good control performance in tracking a known trajectory and the effect of dynamic compensation of pd control with feedforward compensation is obvious 本文首先根据二值图像的特点结合距离变换提出了一种基于ga模式匹配的复杂背景下目标的识别方法，该方法能快速准确的匹配图像中的目标，而且对噪声有较强的鲁棒性；接着对基于pd的2种机器人控制算法(直接pd控制和pd加前馈补偿控制)进行了仿真研究，实验结果表明这两种pd控制算法都具有较好的轨迹跟踪性能，而且pd加前馈控制的动态补偿效果也很明显。
